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Tuesday, August 16, 2016

“Out,
damn'd spot!”— Lady Macbeth. As we at JSR PaperClips
continue our celebration of 400th anniversary of the Bard’s demise,
we recall another famous stained contribution—that of Tony Dickson, who 50
years ago pointed out how staining of carbonate rocks with alizarin red-S and
potassium ferricyanide can aide in differentiation of orthorhombic carbonates
(such as aragonite), trigonal carbonates (such as calcite), and iron-rich
calcite and dolomite. So, with clear
conscience and citing little risk, we recommend re-reading this classic.